+ selftests-proc-fix-proc-empty-vm-build-error-on-non-x86_64.patch added to mm-nonmm-unstable branch

+ selftests-proc-fix-proc-empty-vm-build-error-on-non-x86_64.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: selftests: proc: fix proc-empty-vm build error on non x86_64
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     selftests-proc-fix-proc-empty-vm-build-error-on-non-x86_64.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-proc-fix-proc-empty-vm-build-error-on-non-x86_64.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Punit Agrawal <punit.agrawal@bytedance.com>
Subject: selftests: proc: fix proc-empty-vm build error on non x86_64
Date: Wed, 9 Nov 2022 22:11:03 +0000

The proc-empty-vm test is implemented for x86_64 and fails to build for
other architectures.  Rather then emitting a compiler error it would be
preferable to only build the test on supported architectures.

Mark proc-empty-vm as a test for x86_64 and customise the Makefile to
build it only when building for this target architecture.

Link: https://lkml.kernel.org/r/20221109221104.1797802-1-punit.agrawal@bytedance.com
Fixes: 5bc73bb3451b ("proc: test how it holds up with mapping'less process")
Signed-off-by: Punit Agrawal <punit.agrawal@bytedance.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/proc/Makefile |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/tools/testing/selftests/proc/Makefile~selftests-proc-fix-proc-empty-vm-build-error-on-non-x86_64
+++ a/tools/testing/selftests/proc/Makefile
@@ -1,14 +1,16 @@
 # SPDX-License-Identifier: GPL-2.0-only
+
+# When ARCH not overridden for crosscompiling, lookup machine
+ARCH ?= $(shell uname -m 2>/dev/null || echo not)
+
 CFLAGS += -Wall -O2 -Wno-unused-function
 CFLAGS += -D_GNU_SOURCE
 LDFLAGS += -pthread
 
-TEST_GEN_PROGS :=
 TEST_GEN_PROGS += fd-001-lookup
 TEST_GEN_PROGS += fd-002-posix-eq
 TEST_GEN_PROGS += fd-003-kthread
 TEST_GEN_PROGS += proc-loadavg-001
-TEST_GEN_PROGS += proc-empty-vm
 TEST_GEN_PROGS += proc-pid-vm
 TEST_GEN_PROGS += proc-self-map-files-001
 TEST_GEN_PROGS += proc-self-map-files-002
@@ -26,4 +28,8 @@ TEST_GEN_PROGS += thread-self
 TEST_GEN_PROGS += proc-multiple-procfs
 TEST_GEN_PROGS += proc-fsconfig-hidepid
 
+TEST_GEN_PROGS_x86_64 += proc-empty-vm
+
+TEST_GEN_PROGS += $(TEST_GEN_PROGS_$(ARCH))
+
 include ../lib.mk
_

Patches currently in -mm which might be from punit.agrawal@bytedance.com are

selftests-proc-fix-proc-empty-vm-build-error-on-non-x86_64.patch
selftests-proc-mark-proc-pid-vm-as-x86_64-only.patch